.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #181a20;
}

.login-box {
    background: #23272f;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    color: #fff;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #343a40;
    border-radius: 6px;
    background: #181a20;
    color: #fff;
    font-size: 16px;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #3a7afe;
}

.form-group input::placeholder {
    color: #888;
}

button {
    width: 100%;
    padding: 12px;
    background: #3a7afe;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover:not(:disabled) {
    background: #2c5ce6;
}

button:disabled {
    background: #555;
    cursor: not-allowed;
}

.error {
    color: #ff6b6b;
    text-align: center;
    margin-bottom: 15px;
    font-size: 14px;
}